You better knock, knock on wood.

Why? Well, because today, Sept. 17 marks the 10-year anniversary of the teen comedy Easy A.

The hit film starred Emma Stoneas Olive Penderghast, a 17-year-old girl that lets a lie spiral out of control in order to increase her notoriety at school. Partially inspired by Nathaniel Hawthorne's The Scarlett Letter, Stone's Olive finds herself getting ostracized and decides to stitch a red A into provocative clothing.